How many feet are in a mile?

A mile is a standard unit of measurement in the imperial system, commonly used in the United States and a few other countries. Specifically, one mile is exactly 5,280 feet. This number is derived from the historical context of measuring distance and has been standardized for various applications, including transportation and mapping.

Understanding how many feet are in a mile is fundamental in many fields, such as HVAC, where distances are often calculated for installations, ductwork layouts, or pipe runs. Knowing this specific conversion allows professionals to accurately determine distances when working with HVAC systems or when collaborating on construction projects where distance specifications are crucial.

The other options do not represent the correct number of feet in a mile and thus would lead to miscalculations in practical applications.